e85

[dnkrm]

I have some similar questions and hopefully some answers. Most ethanol blends will be 10%. They are usually 89 octane and are labeled as a 10% blend. More and more there are blends from 87 to 91 octane with the 10% blend but I have not seen as many of those here in Nebraska. The E85 that you mentioned is 85% ethanol and 15% gasoline. But this is only in the summer, in the winter the blend can change to 70% or 75% ethanol and 30% or 25% gasoline. This is where my questions start. Has there been any tunes for E85? I just bought my 06 flex fuel F150 and am looking to run E85 this summer when I know for sure the blend is 85%. If I run the gryphon how does it work with the flex fuel system that comes in the truck? Can I have a custom tune for 89 octane 10% fuel, and one for E85 and switch between the two depending on what I fill up with? thanks